#####################################################################################
## Copyright (c) 2012, pa.eeapai@gmail.com                                         ##
## All rights reserved.                                                            ##
##                                                                                 ##
## Redistribution and use in source and binary forms, with or without              ##
## modification, are permitted provided that the following conditions are met:     ##
##     * Redistributions of source code must retain the above copyright            ##
##       notice, this list of conditions and the following disclaimer.             ##
##     * Redistributions in binary form must reproduce the above copyright         ##
##       notice, this list of conditions and the following disclaimer in the       ##
##       documentation and/or other materials provided with the distribution.      ##
##     * Neither the name of the pa.eeapai@gmail.com nor the                       ##
##       names of its contributors may be used to endorse or promote products      ##
##       derived from this software without specific prior written permission.     ##
##                                                                                 ##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ##
## ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED   ##
## WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE          ##
## DISCLAIMED. IN NO EVENT SHALL pa.eeapai@gmail.com BE LIABLE FOR ANY             ##
## DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES      ##
## (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;    ##
## LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND     ##
## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT      ##
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS   ##
## SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                    ##
#####################################################################################

import urllib2
import sys
import FileUtils as fu

def getFileSize(remoteFile):
  meta = remoteFile.info()
  fileSize = -1
  try:
    fileSize = int(meta['Content-Length'])
  except:
    return -1
  return fileSize
  

def downloadFile(URL, path):
  result = False
  with open(path, 'wb') as localFile:
    try:
      print 'Downloading {0} to {1} '.format(URL, path)
      remoteFile = urllib2.urlopen(URL)
      fileSize = getFileSize(remoteFile)
      fileSizeValid = not (-1 == fileSize)
      CHUNK_SIZE = 1024      
      if fileSizeValid:
        perctangeReported = 0
        downloadedSize = 0
        while True:        
          data = remoteFile.read(CHUNK_SIZE)
          dataSize = len(data)
          if dataSize > 0:
            localFile.write(data)
            downloadedSize = downloadedSize + dataSize 
          else:
            break
          downloadedPercentage = ( 100 * downloadedSize) / fileSize
          if downloadedPercentage >= perctangeReported + 10:
            perctangeReported = perctangeReported + 10
            sys.stdout.write('=')            
      else:     
        localFile.write(remoteFile.read())
      result = True
      print ' SUCCESS'
    except:
      result = False
      print ' FAILED'
  if not result:
    fu.delete(path)
  return result
    